Reamer.



PATENTED OCT. 16, 1906.

C. W. H. POTTER.

BEAMER.

APPLIOATION FILED SEPT. 12. 1904.

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UNrrED STATES viena'iENT oEFIcE CHARLES w. H. POTTER, oF DETROIT. MioHiGA-N, AsSiGNoR or ONE-HALE To WILLIAM AIKMAN, JR., AND ONE-HALE To MINNIE L. PorrER, oF

DETROIT, MICHIGAN.

REMER.

Specification of Letters' Patent.

Patented oet. 1e, 1906.

Application med sepamim 12, 1904. sain 11. 224,126.

To rif/ZZ whom it may concern:

Be it known that I. CHARLESW. H. POTTER, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Reamers, of

which the following is a specicatiom refer-Y ence being had therein to the accompanying drawings.

'This invention relates to certain new and useful improvements inreamers of that class known as convex reamers for forming un-..

dercut sockets in marble or other stone for the purpose of attaching lifting or other securing devices thereto, and has for its ob'ect to provide a device for the purpose whic is simple, light, cheap, and strong and not liable to get out of order, the device being so constructed that the opening may be reamed to any depth and the power applied utilized to the best possible advanta e, the cutters be.

ing at all times accessible or `the purpose of grinding without removingfrom the cutterhead.

To this end the invention consists in the peculiar construction, arrangement, and com the pins D.

E is a ca having an exterior screw-threaded sockete rojection F to iit the interior] screw-threa ed upper end of 'the member g, said cap being integrally formed on its up er side with'a standard bit-shank G, adapt to fit the ordinary carpenters brace.

H is a screwfor preventin the cap from unscrewing in reversing the it, and I is a vertical slot formed in the wall of the socketed projection.

J is a central rod loosely fitting with its upper end in the socketed projection F and provided at its lower end with the inclined ns K, enga g the rear edge of the cutterblades, so t at as the cutter-head is depressed t he blades will be distended, as shown in dotted lines in Fig. 2.

L is a coil-spring sleeved on the rod to hold said pins normally projected below the cutter-head, and M is a stop traveling in the slot I to limit the movement of said rod.

With mg construction the power is `applied to the bla es by a wed e actionnat the eatest possible distance om the' pivota connection, the lower ed e of the cutter-blades, as well as the sides, eing available for cutting as the cutter descends, and by sim ly turning the blades out at right angles t ey maybe readily glround without dismounting from the cutteread.

Having thus fully described my invention, what I claim is 1. In a' reamer, the combination of a head formed with a bit-shank at one end and a longitudinally-disposed socket at the other end, the head being formed with a series of radial slots communicating with said socket, a series orl radial cutters pivotally secured in the head in said slots, a stem carried by the head and longitudinally slidablein the socket, means connecting the head and stem free to have a limited longitudinal movement in relation to each other, inclined ns on the stem adapted to engage the slots and project the cutters and a coil-spring interposed between the head and stem to normally hold the stem projected.

2. In a reamer, the combination of a head formed lwith a bit-shank at one end and a longitudinally-disposed socket at the other end, thev head being formed with a series of radial slots communicating with said socket,

a series of radial cutters pivotally secured in the head in said slots, a stem carried by the head and longitudinally slidable in the socket, said head rovided Witha slot and ,8, pin on the stem 'a apted to travel in said slot to limit the movement of the stem, inclined iins on the stem adapted to engage the rear face of the cutters to project the same and a coil-spring sleeved on the stem to hold the same normally projected.

v, In testimony whereof I affix my signature in presence of two witnesses.

CHARLES W. H. POTTER. Witnesses:

.O'rro F. BABTEEL,

JOSEPH A. Noam. 

